src/egl/drivers/dri2/platform_x11.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  19  * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  20  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors:
  25  *    Kristian Høgsberg <krh@bitplanet.net>
  26  */
  27
  28 #include <stdbool.h>
  29 #include <stdint.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <stdio.h>
  33 #include <limits.h>
  34 #include <dlfcn.h>
  35 #include <fcntl.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #ifdef HAVE_LIBDRM
  39 #include <xf86drm.h>
  40 #endif
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include "util/debug.h"
  44 #include "util/macros.h"
  45
  46 #include "egl_dri2.h"
  47 #include "egl_dri2_fallbacks.h"
  48 #include "loader.h"
  49
  50 #ifdef HAVE_DRI3
  51 #include "platform_x11_dri3.h"
  52 #endif
  53
  54 static EGLBoolean
  55 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
  56                        EGLint interval);
  57
  58 static void
  59 swrastCreateDrawable(struct dri2_egl_display * dri2_dpy,
  60                      struct dri2_egl_surface * dri2_surf)
  61 {
  62    uint32_t           mask;
  63    const uint32_t     function = GXcopy;
  64    uint32_t           valgc[2];
  65
  66    /* create GC's */
  67    dri2_surf->gc = xcb_generate_id(dri2_dpy->conn);
  68    mask = XCB_GC_FUNCTION;
  69    xcb_create_gc(dri2_dpy->conn, dri2_surf->gc, dri2_surf->drawable, mask, &function);
  70
  71    dri2_surf->swapgc = xcb_generate_id(dri2_dpy->conn);
  72    mask = XCB_GC_FUNCTION | XCB_GC_GRAPHICS_EXPOSURES;
  73    valgc[0] = function;
  74    valgc[1] = False;
  75    xcb_create_gc(dri2_dpy->conn, dri2_surf->swapgc, dri2_surf->drawable, mask, valgc);
  76    switch (dri2_surf->depth) {
  77       case 32:
  78       case 24:
  79          dri2_surf->bytes_per_pixel = 4;
  80          break;
  81       case 16:
  82          dri2_surf->bytes_per_pixel = 2;
  83          break;
  84       case 8:
  85          dri2_surf->bytes_per_pixel = 1;
  86          break;
  87       case 0:
  88          dri2_surf->bytes_per_pixel = 0;
  89          break;
  90       default:
  91          _eglLog(_EGL_WARNING, "unsupported depth %d", dri2_surf->depth);
  92    }
  93 }
  94
  95 static void
  96 swrastDestroyDrawable(struct dri2_egl_display * dri2_dpy,
  97                       struct dri2_egl_surface * dri2_surf)
  98 {
  99    xcb_free_gc(dri2_dpy->conn, dri2_surf->gc);
 100    xcb_free_gc(dri2_dpy->conn, dri2_surf->swapgc);
 101 }
 102
 103 static bool
 104 x11_get_drawable_info(__DRIdrawable * draw,
 105                       int *x, int *y, int *w, int *h,
 106                       void *loaderPrivate)
 107 {
 108    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 109    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 110
 111    xcb_get_geometry_cookie_t cookie;
 112    xcb_get_geometry_reply_t *reply;
 113    xcb_generic_error_t *error;
 114    bool ret;
 115
 116    cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 117    reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 118    if (reply == NULL)
 119       return false;
 120
 121    if (error != NULL) {
 122       ret = false;
 123       _eglLog(_EGL_WARNING, "error in xcb_get_geometry");
 124       free(error);
 125    } else {
 126       *x = reply->x;
 127       *y = reply->y;
 128       *w = reply->width;
 129       *h = reply->height;
 130       ret = true;
 131    }
 132    free(reply);
 133    return ret;
 134 }
 135
 136 static void
 137 swrastGetDrawableInfo(__DRIdrawable * draw,
 138                       int *x, int *y, int *w, int *h,
 139                       void *loaderPrivate)
 140 {
 141    *x = *y = *w = *h = 0;
 142    x11_get_drawable_info(draw, x, y, w, h, loaderPrivate);
 143 }
 144
 145 static void
 146 swrastPutImage(__DRIdrawable * draw, int op,
 147                int x, int y, int w, int h,
 148                char *data, void *loaderPrivate)
 149 {
 150    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 151    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 152
 153    xcb_gcontext_t gc;
 154
 155    switch (op) {
 156    case __DRI_SWRAST_IMAGE_OP_DRAW:
 157       gc = dri2_surf->gc;
 158       break;
 159    case __DRI_SWRAST_IMAGE_OP_SWAP:
 160       gc = dri2_surf->swapgc;
 161       break;
 162    default:
 163       return;
 164    }
 165
 166    xcb_put_image(dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP, dri2_surf->drawable,
 167                  gc, w, h, x, y, 0, dri2_surf->depth,
 168                  w*h*dri2_surf->bytes_per_pixel, (const uint8_t *)data);
 169 }
 170
 171 static void
 172 swrastGetImage(__DRIdrawable * read,
 173                int x, int y, int w, int h,
 174                char *data, void *loaderPrivate)
 175 {
 176    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 177    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dri2_surf->base.Resource.Display);
 178
 179    xcb_get_image_cookie_t cookie;
 180    xcb_get_image_reply_t *reply;
 181    xcb_generic_error_t *error;
 182
 183    cookie = xcb_get_image (dri2_dpy->conn, XCB_IMAGE_FORMAT_Z_PIXMAP,
 184                            dri2_surf->drawable, x, y, w, h, ~0);
 185    reply = xcb_get_image_reply (dri2_dpy->conn, cookie, &error);
 186    if (reply == NULL)
 187       return;
 188
 189    if (error != NULL) {
 190       _eglLog(_EGL_WARNING, "error in xcb_get_image");
 191       free(error);
 192    } else {
 193       uint32_t bytes = xcb_get_image_data_length(reply);
 194       uint8_t *idata = xcb_get_image_data(reply);
 195       memcpy(data, idata, bytes);
 196    }
 197    free(reply);
 198 }
 199
 200
 201 static xcb_screen_t *
 202 get_xcb_screen(xcb_screen_iterator_t iter, int screen)
 203 {
 204     for (; iter.rem; --screen, xcb_screen_next(&iter))
 205         if (screen == 0)
 206             return iter.data;
 207
 208     return NULL;
 209 }
 210
 211
 212 /**
 213  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 214  */
 215 static _EGLSurface *
 216 dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
 217                         _EGLConfig *conf, void *native_surface,
 218                         const EGLint *attrib_list)
 219 {
 220    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 221    struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
 222    struct dri2_egl_surface *dri2_surf;
 223    xcb_get_geometry_cookie_t cookie;
 224    xcb_get_geometry_reply_t *reply;
 225    xcb_generic_error_t *error;
 226    const __DRIconfig *config;
 227
 228    (void) drv;
 229
 230    dri2_surf = malloc(sizeof *dri2_surf);
 231    if (!dri2_surf) {
 232       _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
 233       return NULL;
 234    }
 235
 236    if (!dri2_init_surface(&dri2_surf->base, disp, type, conf, attrib_list, false))
 237       goto cleanup_surf;
 238
 239    dri2_surf->region = XCB_NONE;
 240    if (type == EGL_PBUFFER_BIT) {
 241       dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
 242       xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
 243                        dri2_surf->drawable, dri2_dpy->screen->root,
 244                         dri2_surf->base.Width, dri2_surf->base.Height);
 245    } else {
 246       STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
 247       dri2_surf->drawable = (uintptr_t) native_surface;
 248    }
 249
 250    config = dri2_get_dri_config(dri2_conf, type,
 251                                 dri2_surf->base.GLColorspace);
 252
 253    if (dri2_dpy->dri2) {
 254       dri2_surf->dri_drawable =
 255          dri2_dpy->dri2->createNewDrawable(dri2_dpy->dri_screen, config,
 256                                            dri2_surf);
 257    } else {
 258       assert(dri2_dpy->swrast);
 259       dri2_surf->dri_drawable =
 260          dri2_dpy->swrast->createNewDrawable(dri2_dpy->dri_screen, config,
 261                                              dri2_surf);
 262    }
 263
 264    if (dri2_surf->dri_drawable == NULL) {
 265       _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
 266       goto cleanup_pixmap;
 267    }
 268
 269    if (type != EGL_PBUFFER_BIT) {
 270       cookie = xcb_get_geometry (dri2_dpy->conn, dri2_surf->drawable);
 271       reply = xcb_get_geometry_reply (dri2_dpy->conn, cookie, &error);
 272       if (error != NULL) {
 273          if (error->error_code == BadAlloc)
 274             _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 275          else if (type == EGL_WINDOW_BIT)
 276             _eglError(EGL_BAD_NATIVE_WINDOW, "xcb_get_geometry");
 277          else
 278             _eglError(EGL_BAD_NATIVE_PIXMAP, "xcb_get_geometry");
 279          free(error);
 280          goto cleanup_dri_drawable;
 281       } else if (reply == NULL) {
 282          _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
 283          goto cleanup_dri_drawable;
 284       }
 285
 286       dri2_surf->base.Width = reply->width;
 287       dri2_surf->base.Height = reply->height;
 288       dri2_surf->depth = reply->depth;
 289       free(reply);
 290    }
 291
 292    if (dri2_dpy->dri2) {
 293       xcb_void_cookie_t cookie;
 294       int conn_error;
 295
 296       cookie = xcb_dri2_create_drawable_checked(dri2_dpy->conn,
 297                                                 dri2_surf->drawable);
 298       error = xcb_request_check(dri2_dpy->conn, cookie);
 299       conn_error = xcb_connection_has_error(dri2_dpy->conn);
 300       if (conn_error || error != NULL) {
 301          if (type == EGL_PBUFFER_BIT || conn_error || error->error_code == BadAlloc)
 302             _eglError(EGL_BAD_ALLOC, "xcb_dri2_create_drawable_checked");
 303          else if (type == EGL_WINDOW_BIT)
 304             _eglError(EGL_BAD_NATIVE_WINDOW,
 305                       "xcb_dri2_create_drawable_checked");
 306          else
 307             _eglError(EGL_BAD_NATIVE_PIXMAP,
 308                       "xcb_dri2_create_drawable_checked");
 309          free(error);
 310          goto cleanup_dri_drawable;
 311       }
 312    } else {
 313       if (type == EGL_PBUFFER_BIT) {
 314          dri2_surf->depth = _eglGetConfigKey(conf, EGL_BUFFER_SIZE);
 315       }
 316       swrastCreateDrawable(dri2_dpy, dri2_surf);
 317    }
 318
 319    /* we always copy the back buffer to front */
 320    dri2_surf->base.PostSubBufferSupportedNV = EGL_TRUE;
 321
 322    return &dri2_surf->base;
 323
 324  cleanup_dri_drawable:
 325    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 326  cleanup_pixmap:
 327    if (type == EGL_PBUFFER_BIT)
 328       xcb_free_pixmap(dri2_dpy->conn, dri2_surf->drawable);
 329  cleanup_surf:
 330    free(dri2_surf);
 331
 332    return NULL;
 333 }
 334
 335 /**
 336  * Called via eglCreateWindowSurface(), drv->API.CreateWindowSurface().
 337  */
 338 static _EGLSurface *
 339 dri2_x11_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
 340                                _EGLConfig *conf, void *native_window,
 341                                const EGLint *attrib_list)
 342 {
 343    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 344    _EGLSurface *surf;
 345
 346    surf = dri2_x11_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
 347                                   native_window, attrib_list);
 348    if (surf != NULL) {
 349       /* When we first create the DRI2 drawable, its swap interval on the
 350        * server side is 1.
 351        */
 352       surf->SwapInterval = 1;
 353
 354       /* Override that with a driconf-set value. */
 355       dri2_x11_swap_interval(drv, disp, surf, dri2_dpy->default_swap_interval);
 356    }
 357
 358    return surf;
 359 }
 360
 361 static _EGLSurface *
 362 dri2_x11_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
 363                                _EGLConfig *conf, void *native_pixmap,
 364                                const EGLint *attrib_list)
 365 {
 366    return dri2_x11_create_surface(drv, disp, EGL_PIXMAP_BIT, conf,
 367                                   native_pixmap, attrib_list);
 368 }
 369
 370 static _EGLSurface *
 371 dri2_x11_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
 372                                 _EGLConfig *conf, const EGLint *attrib_list)
 373 {
 374    return dri2_x11_create_surface(drv, disp, EGL_PBUFFER_BIT, conf,
 375                                   NULL, attrib_list);
 376 }
 377
 378 static EGLBoolean
 379 dri2_x11_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
 380 {
 381    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 382    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 383
 384    (void) drv;
 385
 386    dri2_dpy->core->destroyDrawable(dri2_surf->dri_drawable);
 387
 388    if (dri2_dpy->dri2) {
 389       xcb_dri2_destroy_drawable (dri2_dpy->conn, dri2_surf->drawable);
 390    } else {
 391       assert(dri2_dpy->swrast);
 392       swrastDestroyDrawable(dri2_dpy, dri2_surf);
 393    }
 394
 395    if (surf->Type == EGL_PBUFFER_BIT)
 396       xcb_free_pixmap (dri2_dpy->conn, dri2_surf->drawable);
 397
 398    dri2_fini_surface(surf);
 399    free(surf);
 400
 401    return EGL_TRUE;
 402 }
 403
 404 /**
 405  * Function utilizes swrastGetDrawableInfo to get surface
 406  * geometry from x server and calls default query surface
 407  * implementation that returns the updated values.
 408  *
 409  * In case of errors we still return values that we currently
 410  * have.
 411  */
 412 static EGLBoolean
 413 dri2_query_surface(_EGLDriver *drv, _EGLDisplay *dpy,
 414                    _EGLSurface *surf, EGLint attribute,
 415                    EGLint *value)
 416 {
 417    struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
 418    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 419    int x, y, w, h;
 420
 421    __DRIdrawable *drawable = dri2_dpy->vtbl->get_dri_drawable(surf);
 422
 423    switch (attribute) {
 424    case EGL_WIDTH:
 425    case EGL_HEIGHT:
 426       if (x11_get_drawable_info(drawable, &x, &y, &w, &h, dri2_surf)) {
 427          surf->Width = w;
 428          surf->Height = h;
 429       }
 430       break;
 431    default:
 432       break;
 433    }
 434    return _eglQuerySurface(drv, dpy, surf, attribute, value);
 435 }
 436
 437 /**
 438  * Process list of buffer received from the server
 439  *
 440  * Processes the list of buffers received in a reply from the server to either
 441  * \c DRI2GetBuffers or \c DRI2GetBuffersWithFormat.
 442  */
 443 static void
 444 dri2_x11_process_buffers(struct dri2_egl_surface *dri2_surf,
 445                          xcb_dri2_dri2_buffer_t *buffers, unsigned count)
 446 {
 447    struct dri2_egl_display *dri2_dpy =
 448       dri2_egl_display(dri2_surf->base.Resource.Display);
 449    xcb_rectangle_t rectangle;
 450
 451    dri2_surf->have_fake_front = false;
 452
 453    /* This assumes the DRI2 buffer attachment tokens matches the
 454     * __DRIbuffer tokens. */
 455    for (unsigned i = 0; i < count; i++) {
 456       dri2_surf->buffers[i].attachment = buffers[i].attachment;
 457       dri2_surf->buffers[i].name = buffers[i].name;
 458       dri2_surf->buffers[i].pitch = buffers[i].pitch;
 459       dri2_surf->buffers[i].cpp = buffers[i].cpp;
 460       dri2_surf->buffers[i].flags = buffers[i].flags;
 461
 462       /* We only use the DRI drivers single buffer configs.  This
 463        * means that if we try to render to a window, DRI2 will give us
 464        * the fake front buffer, which we'll use as a back buffer.
 465        * Note that EGL doesn't require that several clients rendering
 466        * to the same window must see the same aux buffers. */
 467       if (dri2_surf->buffers[i].attachment == __DRI_BUFFER_FAKE_FRONT_LEFT)
 468          dri2_surf->have_fake_front = true;
 469    }
 470
 471    if (dri2_surf->region != XCB_NONE)
 472       xcb_xfixes_destroy_region(dri2_dpy->conn, dri2_surf->region);
 473
 474    rectangle.x = 0;
 475    rectangle.y = 0;
 476    rectangle.width = dri2_surf->base.Width;
 477    rectangle.height = dri2_surf->base.Height;
 478    dri2_surf->region = xcb_generate_id(dri2_dpy->conn);
 479    xcb_xfixes_create_region(dri2_dpy->conn, dri2_surf->region, 1, &rectangle);
 480 }
 481
 482 static __DRIbuffer *
 483 dri2_x11_get_buffers(__DRIdrawable * driDrawable,
 484                      int *width, int *height,
 485                      unsigned int *attachments, int count,
 486                      int *out_count, void *loaderPrivate)
 487 {
 488    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 489    struct dri2_egl_display *dri2_dpy =
 490       dri2_egl_display(dri2_surf->base.Resource.Display);
 491    xcb_dri2_dri2_buffer_t *buffers;
 492    xcb_dri2_get_buffers_reply_t *reply;
 493    xcb_dri2_get_buffers_cookie_t cookie;
 494
 495    (void) driDrawable;
 496
 497    cookie = xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
 498                                             dri2_surf->drawable,
 499                                             count, count, attachments);
 500    reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn, cookie, NULL);
 501    if (reply == NULL)
 502       return NULL;
 503    buffers = xcb_dri2_get_buffers_buffers (reply);
 504    if (buffers == NULL)
 505       return NULL;
 506
 507    *out_count = reply->count;
 508    dri2_surf->base.Width = *width = reply->width;
 509    dri2_surf->base.Height = *height = reply->height;
 510    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 511
 512    free(reply);
 513
 514    return dri2_surf->buffers;
 515 }
 516
 517 static __DRIbuffer *
 518 dri2_x11_get_buffers_with_format(__DRIdrawable * driDrawable,
 519                                  int *width, int *height,
 520                                  unsigned int *attachments, int count,
 521                                  int *out_count, void *loaderPrivate)
 522 {
 523    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 524    struct dri2_egl_display *dri2_dpy =
 525       dri2_egl_display(dri2_surf->base.Resource.Display);
 526    xcb_dri2_dri2_buffer_t *buffers;
 527    xcb_dri2_get_buffers_with_format_reply_t *reply;
 528    xcb_dri2_get_buffers_with_format_cookie_t cookie;
 529    xcb_dri2_attach_format_t *format_attachments;
 530
 531    (void) driDrawable;
 532
 533    format_attachments = (xcb_dri2_attach_format_t *) attachments;
 534    cookie = xcb_dri2_get_buffers_with_format_unchecked (dri2_dpy->conn,
 535                                                         dri2_surf->drawable,
 536                                                         count, count,
 537                                                         format_attachments);
 538
 539    reply = xcb_dri2_get_buffers_with_format_reply (dri2_dpy->conn,
 540                                                    cookie, NULL);
 541    if (reply == NULL)
 542       return NULL;
 543
 544    buffers = xcb_dri2_get_buffers_with_format_buffers (reply);
 545    dri2_surf->base.Width = *width = reply->width;
 546    dri2_surf->base.Height = *height = reply->height;
 547    *out_count = reply->count;
 548    dri2_x11_process_buffers(dri2_surf, buffers, *out_count);
 549
 550    free(reply);
 551
 552    return dri2_surf->buffers;
 553 }
 554
 555 static void
 556 dri2_x11_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
 557 {
 558    (void) driDrawable;
 559
 560    /* FIXME: Does EGL support front buffer rendering at all? */
 561
 562 #if 0
 563    struct dri2_egl_surface *dri2_surf = loaderPrivate;
 564
 565    dri2WaitGL(dri2_surf);
 566 #else
 567    (void) loaderPrivate;
 568 #endif
 569 }
 570
 571 static int
 572 dri2_x11_do_authenticate(struct dri2_egl_display *dri2_dpy, uint32_t id)
 573 {
 574    xcb_dri2_authenticate_reply_t *authenticate;
 575    xcb_dri2_authenticate_cookie_t authenticate_cookie;
 576    int ret = 0;
 577
 578    authenticate_cookie =
 579       xcb_dri2_authenticate_unchecked(dri2_dpy->conn, dri2_dpy->screen->root, id);
 580    authenticate =
 581       xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);
 582
 583    if (authenticate == NULL || !authenticate->authenticated)
 584       ret = -1;
 585
 586    free(authenticate);
 587
 588    return ret;
 589 }
 590
 591 static EGLBoolean
 592 dri2_x11_local_authenticate(struct dri2_egl_display *dri2_dpy)
 593 {
 594 #ifdef HAVE_LIBDRM
 595    drm_magic_t magic;
 596
 597    if (drmGetMagic(dri2_dpy->fd, &magic)) {
 598       _eglLog(_EGL_WARNING, "DRI2: failed to get drm magic");
 599       return EGL_FALSE;
 600    }
 601
 602    if (dri2_x11_do_authenticate(dri2_dpy, magic) < 0) {
 603       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 604       return EGL_FALSE;
 605    }
 606 #endif
 607    return EGL_TRUE;
 608 }
 609
 610 static EGLBoolean
 611 dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
 612 {
 613    xcb_xfixes_query_version_reply_t *xfixes_query;
 614    xcb_xfixes_query_version_cookie_t xfixes_query_cookie;
 615    xcb_dri2_query_version_reply_t *dri2_query;
 616    xcb_dri2_query_version_cookie_t dri2_query_cookie;
 617    xcb_dri2_connect_reply_t *connect;
 618    xcb_dri2_connect_cookie_t connect_cookie;
 619    xcb_generic_error_t *error;
 620    char *driver_name, *loader_driver_name, *device_name;
 621    const xcb_query_extension_reply_t *extension;
 622
 623    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_xfixes_id);
 624    xcb_prefetch_extension_data (dri2_dpy->conn, &xcb_dri2_id);
 625
 626    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_xfixes_id);
 627    if (!(extension && extension->present))
 628       return EGL_FALSE;
 629
 630    extension = xcb_get_extension_data(dri2_dpy->conn, &xcb_dri2_id);
 631    if (!(extension && extension->present))
 632       return EGL_FALSE;
 633
 634    xfixes_query_cookie = xcb_xfixes_query_version(dri2_dpy->conn,
 635                                                   XCB_XFIXES_MAJOR_VERSION,
 636                                                   XCB_XFIXES_MINOR_VERSION);
 637
 638    dri2_query_cookie = xcb_dri2_query_version (dri2_dpy->conn,
 639                                                XCB_DRI2_MAJOR_VERSION,
 640                                                XCB_DRI2_MINOR_VERSION);
 641
 642    connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, dri2_dpy->screen->root,
 643                                    XCB_DRI2_DRIVER_TYPE_DRI);
 644
 645    xfixes_query =
 646       xcb_xfixes_query_version_reply (dri2_dpy->conn,
 647                                       xfixes_query_cookie, &error);
 648    if (xfixes_query == NULL ||
 649        error != NULL || xfixes_query->major_version < 2) {
 650       _eglLog(_EGL_WARNING, "DRI2: failed to query xfixes version");
 651       free(error);
 652       free(xfixes_query);
 653       return EGL_FALSE;
 654    }
 655    free(xfixes_query);
 656
 657    dri2_query =
 658       xcb_dri2_query_version_reply (dri2_dpy->conn, dri2_query_cookie, &error);
 659    if (dri2_query == NULL || error != NULL) {
 660       _eglLog(_EGL_WARNING, "DRI2: failed to query version");
 661       free(error);
 662       return EGL_FALSE;
 663    }
 664    dri2_dpy->dri2_major = dri2_query->major_version;
 665    dri2_dpy->dri2_minor = dri2_query->minor_version;
 666    free(dri2_query);
 667
 668    connect = xcb_dri2_connect_reply (dri2_dpy->conn, connect_cookie, NULL);
 669    if (connect == NULL ||
 670        connect->driver_name_length + connect->device_name_length == 0) {
 671       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
 672       return EGL_FALSE;
 673    }
 674
 675    device_name = xcb_dri2_connect_device_name (connect);
 676
 677    dri2_dpy->fd = loader_open_device(device_name);
 678    if (dri2_dpy->fd == -1) {
 679       _eglLog(_EGL_WARNING,
 680               "DRI2: could not open %s (%s)", device_name, strerror(errno));
 681       free(connect);
 682       return EGL_FALSE;
 683    }
 684
 685    if (!dri2_x11_local_authenticate(dri2_dpy)) {
 686       close(dri2_dpy->fd);
 687       free(connect);
 688       return EGL_FALSE;
 689    }
 690
 691    driver_name = xcb_dri2_connect_driver_name (connect);
 692
 693    /* If Mesa knows about the appropriate driver for this fd, then trust it.
 694     * Otherwise, default to the server's value.
 695     */
 696    loader_driver_name = loader_get_driver_for_fd(dri2_dpy->fd);
 697    if (loader_driver_name) {
 698       dri2_dpy->driver_name = loader_driver_name;
 699    } else {
 700       dri2_dpy->driver_name =
 701          strndup(driver_name,
 702                  xcb_dri2_connect_driver_name_length(connect));
 703    }
 704
 705    if (dri2_dpy->driver_name == NULL) {
 706       close(dri2_dpy->fd);
 707       free(dri2_dpy->driver_name);
 708       free(connect);
 709       return EGL_FALSE;
 710    }
 711
 712 #ifdef HAVE_WAYLAND_PLATFORM
 713    dri2_dpy->device_name =
 714       strndup(device_name,
 715               xcb_dri2_connect_device_name_length(connect));
 716 #endif
 717
 718    free(connect);
 719
 720    return EGL_TRUE;
 721 }
 722
 723 static int
 724 dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 725 {
 726    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 727
 728    return dri2_x11_do_authenticate(dri2_dpy, id);
 729 }
 730
 731 static EGLBoolean
 732 dri2_x11_add_configs_for_visuals(struct dri2_egl_display *dri2_dpy,
 733                                  _EGLDisplay *disp, bool supports_preserved)
 734 {
 735    xcb_depth_iterator_t d;
 736    xcb_visualtype_t *visuals;
 737    int config_count = 0;
 738    EGLint surface_type;
 739
 740    d = xcb_screen_allowed_depths_iterator(dri2_dpy->screen);
 741
 742    surface_type =
 743       EGL_WINDOW_BIT |
 744       EGL_PIXMAP_BIT |
 745       EGL_PBUFFER_BIT;
 746
 747    if (supports_preserved)
 748       surface_type |= EGL_SWAP_BEHAVIOR_PRESERVED_BIT;
 749
 750    while (d.rem > 0) {
 751       EGLBoolean class_added[6] = { 0, };
 752
 753       visuals = xcb_depth_visuals(d.data);
 754
 755       for (int i = 0; i < xcb_depth_visuals_length(d.data); i++) {
 756          if (class_added[visuals[i]._class])
 757             continue;
 758
 759          class_added[visuals[i]._class] = EGL_TRUE;
 760
 761          for (int j = 0; dri2_dpy->driver_configs[j]; j++) {
 762             struct dri2_egl_config *dri2_conf;
 763             const __DRIconfig *config = dri2_dpy->driver_configs[j];
 764
 765             const EGLint config_attrs[] = {
 766                     EGL_NATIVE_VISUAL_ID,    visuals[i].visual_id,
 767                     EGL_NATIVE_VISUAL_TYPE,  visuals[i]._class,
 768                     EGL_NONE
 769             };
 770
 771             unsigned int rgba_masks[4] = {
 772                visuals[i].red_mask,
 773                visuals[i].green_mask,
 774                visuals[i].blue_mask,
 775                0,
 776             };
 777
 778             dri2_conf = dri2_add_config(disp, config, config_count + 1,
 779                                         surface_type, config_attrs,
 780                                         rgba_masks);
 781             if (dri2_conf)
 782                if (dri2_conf->base.ConfigID == config_count + 1)
 783                   config_count++;
 784
 785             /* Allow a 24-bit RGB visual to match a 32-bit RGBA EGLConfig.
 786              * Otherwise it will only match a 32-bit RGBA visual.  On a
 787              * composited window manager on X11, this will make all of the
 788              * EGLConfigs with destination alpha get blended by the
 789              * compositor.  This is probably not what the application
 790              * wants... especially on drivers that only have 32-bit RGBA
 791              * EGLConfigs! */
 792             if (d.data->depth == 24) {
 793                rgba_masks[3] =
 794                   ~(rgba_masks[0] | rgba_masks[1] | rgba_masks[2]);
 795                dri2_conf = dri2_add_config(disp, config, config_count + 1,
 796                                            surface_type, config_attrs,
 797                                            rgba_masks);
 798                if (dri2_conf)
 799                   if (dri2_conf->base.ConfigID == config_count + 1)
 800                      config_count++;
 801             }
 802          }
 803       }
 804
 805       xcb_depth_next(&d);
 806    }
 807
 808    if (!config_count) {
 809       _eglLog(_EGL_WARNING, "DRI2: failed to create any config");
 810       return EGL_FALSE;
 811    }
 812
 813    return EGL_TRUE;
 814 }
 815
 816 static EGLBoolean
 817 dri2_copy_region(_EGLDriver *drv, _EGLDisplay *disp,
 818                  _EGLSurface *draw, xcb_xfixes_region_t region)
 819 {
 820    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 821    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 822    enum xcb_dri2_attachment_t render_attachment;
 823    xcb_dri2_copy_region_cookie_t cookie;
 824
 825    /* No-op for a pixmap or pbuffer surface */
 826    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 827       return EGL_TRUE;
 828
 829    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 830
 831    if (dri2_surf->have_fake_front)
 832       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_FAKE_FRONT_LEFT;
 833    else
 834       render_attachment = XCB_DRI2_ATTACHMENT_BUFFER_BACK_LEFT;
 835
 836    cookie = xcb_dri2_copy_region_unchecked(dri2_dpy->conn,
 837                                            dri2_surf->drawable,
 838                                            region,
 839                                            XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT,
 840                                            render_attachment);
 841    free(xcb_dri2_copy_region_reply(dri2_dpy->conn, cookie, NULL));
 842
 843    return EGL_TRUE;
 844 }
 845
 846 static int64_t
 847 dri2_x11_swap_buffers_msc(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 848                           int64_t msc, int64_t divisor, int64_t remainder)
 849 {
 850    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 851    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 852    uint32_t msc_hi = msc >> 32;
 853    uint32_t msc_lo = msc & 0xffffffff;
 854    uint32_t divisor_hi = divisor >> 32;
 855    uint32_t divisor_lo = divisor & 0xffffffff;
 856    uint32_t remainder_hi = remainder >> 32;
 857    uint32_t remainder_lo = remainder & 0xffffffff;
 858    xcb_dri2_swap_buffers_cookie_t cookie;
 859    xcb_dri2_swap_buffers_reply_t *reply;
 860    int64_t swap_count = -1;
 861
 862    /* No-op for a pixmap or pbuffer surface */
 863    if (draw->Type == EGL_PIXMAP_BIT || draw->Type == EGL_PBUFFER_BIT)
 864       return 0;
 865
 866    if (draw->SwapBehavior == EGL_BUFFER_PRESERVED || !dri2_dpy->swap_available)
 867       return dri2_copy_region(drv, disp, draw, dri2_surf->region) ? 0 : -1;
 868
 869    dri2_flush_drawable_for_swapbuffers(disp, draw);
 870
 871    cookie = xcb_dri2_swap_buffers_unchecked(dri2_dpy->conn, dri2_surf->drawable,
 872                   msc_hi, msc_lo, divisor_hi, divisor_lo, remainder_hi, remainder_lo);
 873
 874    reply = xcb_dri2_swap_buffers_reply(dri2_dpy->conn, cookie, NULL);
 875
 876    if (reply) {
 877       swap_count = (((int64_t)reply->swap_hi) << 32) | reply->swap_lo;
 878       free(reply);
 879    }
 880
 881    /* Since we aren't watching for the server's invalidate events like we're
 882     * supposed to (due to XCB providing no mechanism for filtering the events
 883     * the way xlib does), and SwapBuffers is a common cause of invalidate
 884     * events, just shove one down to the driver, even though we haven't told
 885     * the driver that we're the kind of loader that provides reliable
 886     * invalidate events.  This causes the driver to request buffers again at
 887     * its next draw, so that we get the correct buffers if a pageflip
 888     * happened.  The driver should still be using the viewport hack to catch
 889     * window resizes.
 890     */
 891    if (dri2_dpy->flush->base.version >= 3 && dri2_dpy->flush->invalidate)
 892       dri2_dpy->flush->invalidate(dri2_surf->dri_drawable);
 893
 894    return swap_count;
 895 }
 896
 897 static EGLBoolean
 898 dri2_x11_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
 899 {
 900    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 901    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 902
 903    if (!dri2_dpy->flush) {
 904       dri2_dpy->core->swapBuffers(dri2_surf->dri_drawable);
 905       return EGL_TRUE;
 906    }
 907
 908    if (dri2_x11_swap_buffers_msc(drv, disp, draw, 0, 0, 0) == -1) {
 909       /* Swap failed with a window drawable. */
 910       return _eglError(EGL_BAD_NATIVE_WINDOW, __func__);
 911    }
 912    return EGL_TRUE;
 913 }
 914
 915 static EGLBoolean
 916 dri2_x11_swap_buffers_region(_EGLDriver *drv, _EGLDisplay *disp,
 917                              _EGLSurface *draw,
 918                              EGLint numRects, const EGLint *rects)
 919 {
 920    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 921    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
 922    EGLBoolean ret;
 923    xcb_xfixes_region_t region;
 924    xcb_rectangle_t rectangles[16];
 925
 926    if (numRects > (int)ARRAY_SIZE(rectangles))
 927       return dri2_copy_region(drv, disp, draw, dri2_surf->region);
 928
 929    for (int i = 0; i < numRects; i++) {
 930       rectangles[i].x = rects[i * 4];
 931       rectangles[i].y = dri2_surf->base.Height - rects[i * 4 + 1] - rects[i * 4 + 3];
 932       rectangles[i].width = rects[i * 4 + 2];
 933       rectangles[i].height = rects[i * 4 + 3];
 934    }
 935
 936    region = xcb_generate_id(dri2_dpy->conn);
 937    xcb_xfixes_create_region(dri2_dpy->conn, region, numRects, rectangles);
 938    ret = dri2_copy_region(drv, disp, draw, region);
 939    xcb_xfixes_destroy_region(dri2_dpy->conn, region);
 940
 941    return ret;
 942 }
 943
 944 static EGLBoolean
 945 dri2_x11_post_sub_buffer(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw,
 946                      EGLint x, EGLint y, EGLint width, EGLint height)
 947 {
 948    const EGLint rect[4] = { x, y, width, height };
 949
 950    if (x < 0 || y < 0 || width < 0 || height < 0)
 951       _eglError(EGL_BAD_PARAMETER, "eglPostSubBufferNV");
 952
 953    return dri2_x11_swap_buffers_region(drv, disp, draw, 1, rect);
 954 }
 955
 956 static EGLBoolean
 957 dri2_x11_swap_interval(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 958                        EGLint interval)
 959 {
 960    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 961    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 962
 963    if (dri2_dpy->swap_available)
 964       xcb_dri2_swap_interval(dri2_dpy->conn, dri2_surf->drawable, interval);
 965
 966    return EGL_TRUE;
 967 }
 968
 969 static EGLBoolean
 970 dri2_x11_copy_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf,
 971                       void *native_pixmap_target)
 972 {
 973    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
 974    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
 975    xcb_gcontext_t gc;
 976    xcb_pixmap_t target;
 977
 978    STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_pixmap_target));
 979    target = (uintptr_t) native_pixmap_target;
 980
 981    (void) drv;
 982
 983    dri2_dpy->flush->flush(dri2_surf->dri_drawable);
 984
 985    gc = xcb_generate_id(dri2_dpy->conn);
 986    xcb_create_gc(dri2_dpy->conn, gc, target, 0, NULL);
 987    xcb_copy_area(dri2_dpy->conn,
 988                   dri2_surf->drawable,
 989                   target,
 990                   gc,
 991                   0, 0,
 992                   0, 0,
 993                   dri2_surf->base.Width,
 994                   dri2_surf->base.Height);
 995    xcb_free_gc(dri2_dpy->conn, gc);
 996
 997    return EGL_TRUE;
 998 }
 999
1000 static _EGLImage *
1001 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
1002                              EGLClientBuffer buffer, const EGLint *attr_list)
1003 {
1004    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1005    struct dri2_egl_image *dri2_img;
1006    unsigned int attachments[1];
1007    xcb_drawable_t drawable;
1008    xcb_dri2_get_buffers_cookie_t buffers_cookie;
1009    xcb_dri2_get_buffers_reply_t *buffers_reply;
1010    xcb_dri2_dri2_buffer_t *buffers;
1011    xcb_get_geometry_cookie_t geometry_cookie;
1012    xcb_get_geometry_reply_t *geometry_reply;
1013    xcb_generic_error_t *error;
1014    int stride, format;
1015
1016    (void) ctx;
1017
1018    drawable = (xcb_drawable_t) (uintptr_t) buffer;
1019    xcb_dri2_create_drawable (dri2_dpy->conn, drawable);
1020    attachments[0] = XCB_DRI2_ATTACHMENT_BUFFER_FRONT_LEFT;
1021    buffers_cookie =
1022       xcb_dri2_get_buffers_unchecked (dri2_dpy->conn,
1023                                       drawable, 1, 1, attachments);
1024    geometry_cookie = xcb_get_geometry (dri2_dpy->conn, drawable);
1025    buffers_reply = xcb_dri2_get_buffers_reply (dri2_dpy->conn,
1026                                                buffers_cookie, NULL);
1027    if (buffers_reply == NULL)
1028      return NULL;
1029
1030    buffers = xcb_dri2_get_buffers_buffers (buffers_reply);
1031    if (buffers == NULL) {
1032       return NULL;
1033    }
1034
1035    geometry_reply = xcb_get_geometry_reply (dri2_dpy->conn,
1036                                             geometry_cookie, &error);
1037    if (geometry_reply == NULL || error != NULL) {
1038       _eglError(EGL_BAD_ALLOC, "xcb_get_geometry");
1039       free(error);
1040       free(buffers_reply);
1041       return NULL;
1042    }
1043
1044    switch (geometry_reply->depth) {
1045    case 16:
1046       format = __DRI_IMAGE_FORMAT_RGB565;
1047       break;
1048    case 24:
1049       format = __DRI_IMAGE_FORMAT_XRGB8888;
1050       break;
1051    case 32:
1052       format = __DRI_IMAGE_FORMAT_ARGB8888;
1053       break;
1054    default:
1055       _eglError(EGL_BAD_PARAMETER,
1056                 "dri2_create_image_khr: unsupported pixmap depth");
1057       free(buffers_reply);
1058       free(geometry_reply);
1059       return NULL;
1060    }
1061
1062    dri2_img = malloc(sizeof *dri2_img);
1063    if (!dri2_img) {
1064       free(buffers_reply);
1065       free(geometry_reply);
1066       _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr");
1067       return EGL_NO_IMAGE_KHR;
1068    }
1069
1070    _eglInitImage(&dri2_img->base, disp);
1071
1072    stride = buffers[0].pitch / buffers[0].cpp;
1073    dri2_img->dri_image =
1074       dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
1075                                            buffers_reply->width,
1076                                            buffers_reply->height,
1077                                            format,
1078                                            buffers[0].name,
1079                                            stride,
1080                                            dri2_img);
1081
1082    free(buffers_reply);
1083    free(geometry_reply);
1084
1085    return &dri2_img->base;
1086 }
1087
1088 static _EGLImage *
1089 dri2_x11_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
1090                           _EGLContext *ctx, EGLenum target,
1091                           EGLClientBuffer buffer, const EGLint *attr_list)
1092 {
1093    (void) drv;
1094
1095    switch (target) {
1096    case EGL_NATIVE_PIXMAP_KHR:
1097       return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);
1098    default:
1099       return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
1100    }
1101 }
1102
1103 static EGLBoolean
1104 dri2_x11_get_sync_values(_EGLDisplay *display, _EGLSurface *surface,
1105                          EGLuint64KHR *ust, EGLuint64KHR *msc,
1106                          EGLuint64KHR *sbc)
1107 {
1108    struct dri2_egl_display *dri2_dpy = dri2_egl_display(display);
1109    struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);
1110    xcb_dri2_get_msc_cookie_t cookie;
1111    xcb_dri2_get_msc_reply_t *reply;
1112
1113    cookie = xcb_dri2_get_msc(dri2_dpy->conn, dri2_surf->drawable);
1114    reply = xcb_dri2_get_msc_reply(dri2_dpy->conn, cookie, NULL);
1115
1116    if (!reply)
1117       return _eglError(EGL_BAD_ACCESS, __func__);
1118
1119    *ust = ((EGLuint64KHR) reply->ust_hi << 32) | reply->ust_lo;
1120    *msc = ((EGLuint64KHR) reply->msc_hi << 32) | reply->msc_lo;
1121    *sbc = ((EGLuint64KHR) reply->sbc_hi << 32) | reply->sbc_lo;
1122    free(reply);
1123
1124    return EGL_TRUE;
1125 }
1126
1127 static const struct dri2_egl_display_vtbl dri2_x11_swrast_display_vtbl = {
1128    .authenticate = NULL,
1129    .create_window_surface = dri2_x11_create_window_surface,
1130    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1131    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1132    .destroy_surface = dri2_x11_destroy_surface,
1133    .create_image = dri2_create_image_khr,
1134    .swap_interval = dri2_fallback_swap_interval,
1135    .swap_buffers = dri2_x11_swap_buffers,
1136    .set_damage_region = dri2_fallback_set_damage_region,
1137    .swap_buffers_region = dri2_fallback_swap_buffers_region,
1138    .post_sub_buffer = dri2_fallback_post_sub_buffer,
1139    .copy_buffers = dri2_x11_copy_buffers,
1140    .query_buffer_age = dri2_fallback_query_buffer_age,
1141    .query_surface = dri2_query_surface,
1142    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1143    .get_sync_values = dri2_fallback_get_sync_values,
1144    .get_dri_drawable = dri2_surface_get_dri_drawable,
1145 };
1146
1147 static const struct dri2_egl_display_vtbl dri2_x11_display_vtbl = {
1148    .authenticate = dri2_x11_authenticate,
1149    .create_window_surface = dri2_x11_create_window_surface,
1150    .create_pixmap_surface = dri2_x11_create_pixmap_surface,
1151    .create_pbuffer_surface = dri2_x11_create_pbuffer_surface,
1152    .destroy_surface = dri2_x11_destroy_surface,
1153    .create_image = dri2_x11_create_image_khr,
1154    .swap_interval = dri2_x11_swap_interval,
1155    .swap_buffers = dri2_x11_swap_buffers,
1156    .swap_buffers_with_damage = dri2_fallback_swap_buffers_with_damage,
1157    .swap_buffers_region = dri2_x11_swap_buffers_region,
1158    .set_damage_region = dri2_fallback_set_damage_region,
1159    .post_sub_buffer = dri2_x11_post_sub_buffer,
1160    .copy_buffers = dri2_x11_copy_buffers,
1161    .query_buffer_age = dri2_fallback_query_buffer_age,
1162    .query_surface = dri2_query_surface,
1163    .create_wayland_buffer_from_image = dri2_fallback_create_wayland_buffer_from_image,
1164    .get_sync_values = dri2_x11_get_sync_values,
1165    .get_dri_drawable = dri2_surface_get_dri_drawable,
1166 };
1167
1168 static const __DRIswrastLoaderExtension swrast_loader_extension = {
1169    .base = { __DRI_SWRAST_LOADER, 1 },
1170
1171    .getDrawableInfo = swrastGetDrawableInfo,
1172    .putImage        = swrastPutImage,
1173    .getImage        = swrastGetImage,
1174 };
1175
1176 static const __DRIextension *swrast_loader_extensions[] = {
1177    &swrast_loader_extension.base,
1178    &image_lookup_extension.base,
1179    NULL,
1180 };
1181
1182 static EGLBoolean
1183 dri2_get_xcb_connection(_EGLDriver *drv, _EGLDisplay *disp,
1184                         struct dri2_egl_display *dri2_dpy)
1185 {
1186    xcb_screen_iterator_t s;
1187    int screen = (uintptr_t)disp->Options.Platform;
1188    const char *msg;
1189
1190    disp->DriverData = (void *) dri2_dpy;
1191    if (disp->PlatformDisplay == NULL) {
1192       dri2_dpy->conn = xcb_connect(NULL, &screen);
1193       dri2_dpy->own_device = true;
1194    } else {
1195       Display *dpy = disp->PlatformDisplay;
1196
1197       dri2_dpy->conn = XGetXCBConnection(dpy);
1198       screen = DefaultScreen(dpy);
1199    }
1200
1201    if (!dri2_dpy->conn || xcb_connection_has_error(dri2_dpy->conn)) {
1202       msg = "xcb_connect failed";
1203       goto disconnect;
1204    }
1205
1206    s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
1207    dri2_dpy->screen = get_xcb_screen(s, screen);
1208    if (!dri2_dpy->screen) {
1209       msg = "failed to get xcb screen";
1210       goto disconnect;
1211    }
1212
1213    return EGL_TRUE;
1214 disconnect:
1215    if (disp->PlatformDisplay == NULL)
1216       xcb_disconnect(dri2_dpy->conn);
1217
1218    return _eglError(EGL_BAD_ALLOC, msg);
1219 }
1220
1221 static EGLBoolean
1222 dri2_initialize_x11_swrast(_EGLDriver *drv, _EGLDisplay *disp)
1223 {
1224    struct dri2_egl_display *dri2_dpy;
1225
1226    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1227    if (!dri2_dpy)
1228       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1229
1230    dri2_dpy->fd = -1;
1231    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1232       goto cleanup;
1233
1234    /*
1235     * Every hardware driver_name is set using strdup. Doing the same in
1236     * here will allow is to simply free the memory at dri2_terminate().
1237     */
1238    dri2_dpy->driver_name = strdup("swrast");
1239    if (!dri2_load_driver_swrast(disp))
1240       goto cleanup;
1241
1242    dri2_dpy->loader_extensions = swrast_loader_extensions;
1243
1244    if (!dri2_create_screen(disp))
1245       goto cleanup;
1246
1247    if (!dri2_setup_extensions(disp))
1248       goto cleanup;
1249
1250    dri2_setup_screen(disp);
1251
1252    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1253       goto cleanup;
1254
1255    /* Fill vtbl last to prevent accidentally calling virtual function during
1256     * initialization.
1257     */
1258    dri2_dpy->vtbl = &dri2_x11_swrast_display_vtbl;
1259
1260    return EGL_TRUE;
1261
1262  cleanup:
1263    dri2_display_destroy(disp);
1264    return EGL_FALSE;
1265 }
1266
1267 static void
1268 dri2_x11_setup_swap_interval(_EGLDisplay *disp)
1269 {
1270    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
1271    int arbitrary_max_interval = 1000;
1272
1273    /* default behavior for no SwapBuffers support: no vblank syncing
1274     * either.
1275     */
1276    dri2_dpy->min_swap_interval = 0;
1277    dri2_dpy->max_swap_interval = 0;
1278
1279    if (!dri2_dpy->swap_available)
1280       return;
1281
1282    /* If we do have swapbuffers, then we can support pretty much any swap
1283     * interval.
1284     */
1285    dri2_setup_swap_interval(disp, arbitrary_max_interval);
1286 }
1287
1288 #ifdef HAVE_DRI3
1289
1290 static const __DRIextension *dri3_image_loader_extensions[] = {
1291    &dri3_image_loader_extension.base,
1292    &image_lookup_extension.base,
1293    &use_invalidate.base,
1294    &background_callable_extension.base,
1295    NULL,
1296 };
1297
1298 static EGLBoolean
1299 dri2_initialize_x11_dri3(_EGLDriver *drv, _EGLDisplay *disp)
1300 {
1301    struct dri2_egl_display *dri2_dpy;
1302
1303    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1304    if (!dri2_dpy)
1305       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1306
1307    dri2_dpy->fd = -1;
1308    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1309       goto cleanup;
1310
1311    if (!dri3_x11_connect(dri2_dpy))
1312       goto cleanup;
1313
1314    if (!dri2_load_driver_dri3(disp))
1315       goto cleanup;
1316
1317    dri2_dpy->loader_extensions = dri3_image_loader_extensions;
1318
1319    dri2_dpy->swap_available = true;
1320    dri2_dpy->invalidate_available = true;
1321
1322    if (!dri2_create_screen(disp))
1323       goto cleanup;
1324
1325    if (!dri2_setup_extensions(disp))
1326       goto cleanup;
1327
1328    dri2_setup_screen(disp);
1329
1330    dri2_x11_setup_swap_interval(disp);
1331
1332    if (!dri2_dpy->is_different_gpu)
1333       disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1334    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1335    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1336    disp->Extensions.EXT_buffer_age = EGL_TRUE;
1337
1338    dri2_set_WL_bind_wayland_display(drv, disp);
1339
1340    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, false))
1341       goto cleanup;
1342
1343    dri2_dpy->loader_dri3_ext.core = dri2_dpy->core;
1344    dri2_dpy->loader_dri3_ext.image_driver = dri2_dpy->image_driver;
1345    dri2_dpy->loader_dri3_ext.flush = dri2_dpy->flush;
1346    dri2_dpy->loader_dri3_ext.tex_buffer = dri2_dpy->tex_buffer;
1347    dri2_dpy->loader_dri3_ext.image = dri2_dpy->image;
1348    dri2_dpy->loader_dri3_ext.config = dri2_dpy->config;
1349
1350    /* Fill vtbl last to prevent accidentally calling virtual function during
1351     * initialization.
1352     */
1353    dri2_dpy->vtbl = &dri3_x11_display_vtbl;
1354
1355    _eglLog(_EGL_INFO, "Using DRI3");
1356
1357    return EGL_TRUE;
1358
1359  cleanup:
1360    dri2_display_destroy(disp);
1361    return EGL_FALSE;
1362 }
1363 #endif
1364
1365 static const __DRIdri2LoaderExtension dri2_loader_extension_old = {
1366    .base = { __DRI_DRI2_LOADER, 2 },
1367
1368    .getBuffers           = dri2_x11_get_buffers,
1369    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1370    .getBuffersWithFormat = NULL,
1371 };
1372
1373 static const __DRIdri2LoaderExtension dri2_loader_extension = {
1374    .base = { __DRI_DRI2_LOADER, 3 },
1375
1376    .getBuffers           = dri2_x11_get_buffers,
1377    .flushFrontBuffer     = dri2_x11_flush_front_buffer,
1378    .getBuffersWithFormat = dri2_x11_get_buffers_with_format,
1379 };
1380
1381 static const __DRIextension *dri2_loader_extensions_old[] = {
1382    &dri2_loader_extension_old.base,
1383    &image_lookup_extension.base,
1384    &background_callable_extension.base,
1385    NULL,
1386 };
1387
1388 static const __DRIextension *dri2_loader_extensions[] = {
1389    &dri2_loader_extension.base,
1390    &image_lookup_extension.base,
1391    &use_invalidate.base,
1392    &background_callable_extension.base,
1393    NULL,
1394 };
1395
1396 static EGLBoolean
1397 dri2_initialize_x11_dri2(_EGLDriver *drv, _EGLDisplay *disp)
1398 {
1399    struct dri2_egl_display *dri2_dpy;
1400
1401    dri2_dpy = calloc(1, sizeof *dri2_dpy);
1402    if (!dri2_dpy)
1403       return _eglError(EGL_BAD_ALLOC, "eglInitialize");
1404
1405    dri2_dpy->fd = -1;
1406    if (!dri2_get_xcb_connection(drv, disp, dri2_dpy))
1407       goto cleanup;
1408
1409    if (!dri2_x11_connect(dri2_dpy))
1410       goto cleanup;
1411
1412    if (!dri2_load_driver(disp))
1413       goto cleanup;
1414
1415    if (dri2_dpy->dri2_minor >= 1)
1416       dri2_dpy->loader_extensions = dri2_loader_extensions;
1417    else
1418       dri2_dpy->loader_extensions = dri2_loader_extensions_old;
1419
1420    dri2_dpy->swap_available = (dri2_dpy->dri2_minor >= 2);
1421    dri2_dpy->invalidate_available = (dri2_dpy->dri2_minor >= 3);
1422
1423    if (!dri2_create_screen(disp))
1424       goto cleanup;
1425
1426    if (!dri2_setup_extensions(disp))
1427       goto cleanup;
1428
1429    dri2_setup_screen(disp);
1430
1431    dri2_x11_setup_swap_interval(disp);
1432
1433    disp->Extensions.KHR_image_pixmap = EGL_TRUE;
1434    disp->Extensions.NOK_swap_region = EGL_TRUE;
1435    disp->Extensions.NOK_texture_from_pixmap = EGL_TRUE;
1436    disp->Extensions.NV_post_sub_buffer = EGL_TRUE;
1437    disp->Extensions.CHROMIUM_sync_control = EGL_TRUE;
1438
1439    dri2_set_WL_bind_wayland_display(drv, disp);
1440
1441    if (!dri2_x11_add_configs_for_visuals(dri2_dpy, disp, true))
1442       goto cleanup;
1443
1444    /* Fill vtbl last to prevent accidentally calling virtual function during
1445     * initialization.
1446     */
1447    dri2_dpy->vtbl = &dri2_x11_display_vtbl;
1448
1449    _eglLog(_EGL_INFO, "Using DRI2");
1450
1451    return EGL_TRUE;
1452
1453  cleanup:
1454    dri2_display_destroy(disp);
1455    return EGL_FALSE;
1456 }
1457
1458 EGLBoolean
1459 dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp)
1460 {
1461    EGLBoolean initialized = EGL_FALSE;
1462
1463    if (!env_var_as_boolean("LIBGL_ALWAYS_SOFTWARE", false)) {
1464 #ifdef HAVE_DRI3
1465       if (!env_var_as_boolean("LIBGL_DRI3_DISABLE", false))
1466          initialized = dri2_initialize_x11_dri3(drv, disp);
1467 #endif
1468
1469       if (!initialized)
1470          initialized = dri2_initialize_x11_dri2(drv, disp);
1471    }
1472
1473    if (!initialized)
1474       initialized = dri2_initialize_x11_swrast(drv, disp);
1475
1476    return initialized;
1477 }
1478